Improved phase detector for electro-optical phase-locked loops

2008 ◽  
Vol 44 (12) ◽  
pp. 758 ◽  
Author(s):  
L. Naglič ◽  
L. Pavlovič ◽  
B. Batagelj ◽  
M. Vidmar
Keyword(s):  
Phase Detector ◽  
Phase Locked Loops ◽  
Optical Phase

IMPROVED PERFORMANCE PHASE DETECTOR FOR MULTIPLICATIVE SECOND-ORDER PLL SYSTEMS USING DEFORMED ALGEBRA

2014 ◽  
Vol 23 (01) ◽  
pp. 1450008
Author(s):  
MARCONI O. DE ALMEIDA ◽  
EDUARDO T. F. SANTOS ◽  
JOSÉ M. ARAÚJO
Keyword(s):  
Control Systems ◽  
Tracking System ◽  
Phase Detector ◽  
Phase Locked Loops ◽  
Frequency Tracking ◽  
Maximum Likelihood Approach ◽  
Multiplicative Type ◽  
Likelihood Approach ◽  
Improved Performance ◽  
And Control

Phase-locked loops (PLL) is a phase and/or frequency tracking system, widely used in communication and control systems. The sinusoidal multiplicative type PLL still remains a recurrent model, due the fact that its derivation is originated from the maximum likelihood approach. In this note, it is showed as a generalized product, called q-product, which can be used to implement the phase detector and improve some important parameters of the PLL system, as the block linearity and pull-in characteristics. Numerical examples are presented in order to illustrate the proposal.

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